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| 1 | Effect of Intensive Inorganic Fertilizer Application on Microbial Properties in a Paddy Soil of Subtropical China显示文摘A field experiment with rice-rice rotation was conducted since 2002 in southeast China for investigating the response of soil microbial properties to intensive nitrogen fertilizer application.The tested soil was a subtropical paddy soil derived from Quaternary red clay.Differences between treatments existed in different application rates of urea when the experiment was designed.Urea was applied in five rates,i.e.,0,0.5,1,1.5,and 2 U,equivalent to 0,0.5,1,1.5,and 2 times the local average amount of urea application(900 kg urea ha-1 yr-1,equivalent to 414 kg N ha-1 yr-1).In 2007,soil total nitrogen,available nitrogen,and soil organic carbon contents were increased by 10.2-27.9,8.0-16.0,and 10.2-30.6%,respectively,in treatments with urea application rates of 0.5 to 2 U compared to control(0 U).Microbial biomass carbon and nitrogen were also increased by 3.1-30.8 and 1.3-13.9%,respectively,in treatments with urea application.Basal respiration in treatments with urea input were 9.4-29.1% higher than that in control.However,changes of bacterial functional diversity had different trends.Urea fertilization enhanced bacterial functional diversity until treatment of 1 U,but re-decreased it from treatment of 1.5 U.Principal components analysis indicated that there were intimate relationships among soil organic matter,nitrogen nutrient,microbial biomass,and respiration.Nevertheless,microbial diversity was related to soil moisture contents after urea application.We conclude here that the application of N fertilizer improved soil microbial biomass and respiratory activity.But,microbial diversity was reduced when excessive urea was applied in the tested paddy soil. | Klemens Ekschmitt Stephanie I J Holzhauer Sabine Rauch | 2011 | Agricultural Sciences in China2011，10，11： | 5 |
| 2 | SOM fractionation methods: relevance to functional pools and to stabi- lization mechanisms 显示文摘 | Von Latzow M Kgel - Knabner I Ekschmitt K | 2007 | Soil Biology & Biochemistry2007，39，： | 1 |
| 3 | SOM fractionation methods: Relevance to functional pools and to stabilization mechanisms显示文摘 | von Ltitzow KOgel-Knabner M Ekschmitt I Flessa K Guggenberger H Matzner G Marschner E | 2007 | Soil Biology and Bioche- mistry2007，39，9： | 1 |
| 4 | SOMfractionation methods:relevance to functional pools and tostabilization mechanisms显示文摘 | Von Lützowa M Kügel-Knabnera I Ekschmitt K | | 0，，09： | 1 |
| 5 | Strategies used by soil biota to overcome soil organic matter stability Why is dead organic matter left over in the soil显示文摘 | Ekschmitt K Liu M Vetter S etal | 2005 | Geoderma2005，128，： | 1 |
| 6 | Stabilization of organic matter in temperate soils:Mechanisms and their relevance under different soil conditions: A review显示文摘 | Lutzow M V Kogel-Knabtaer I Ekschmitt K | 2006 | European Journal of Soil Science2006，57，： | 1 |
| 7 | SOM fractionation methods: Relevance to functional pools and to stabilization mechanisms显示文摘 | Lutzow M Kogel-Knabner I Ekschmitt K | 2007 | Soil Biology & Biochemistry2007，39，： | 1 |
| 8 | SOM fractionation methods : Relevance to functional pools and to stabilization mechanisms 显示文摘 | Von Lutzow M Kogel-Knabner I Ekschmitt K | 2007 | Soil Biology and Biochemistry2007，39，： | 1 |
| 9 | SOM fractionation methods: Relevance to functional pools and to stabilization mechanisms 显示文摘 | LUTZOWA M V KOGEL-KNABNER I EKSCHMITT K | 2007 | Soil Biol Biochem2007，39，： | 1 |
| 10 | Stabilization of organic matter in temperate soils: Mechanism s and their relevance under different soil conditions-A review 显示文摘 | LUTZOW M KOGEL-KNABNER I EKSCHMITT K | 2006 | European Journal of Soil Science2006，57，4： | 1 |
| 11 | Changes in nematode communities following cultivationof soils after fallow periods of different length 显示文摘 | VILLENAVE C BONGERS T EKSCHMITT K | 2001 | Applied Soil Ecology2001，17，： | 1 |
| 12 | Soil fauna modifies the recalcitrance-persistence relationship of soil carbon pools 显示文摘 | FOX O VETTER S EKSCHMITT K | 2006 | Soil Biology - Biochemistry2006，38，： | 1 |
| 13 | SOM fractionation methods: Relevance to functional pools and to stabilization mechanisms显示文摘 | von Lutzow M Kogel-Knabner I Ekschmitt K | 2007 | Soil Biology and Biochemistry2007，39，9： | 1 |
| 14 | Soil biodiversity and its implications for ecosystem functioning in a heteroge- neous and variable environment显示文摘 | Ekschmitt K Griffiths B S | 1998 | Applied Soil Ecology1998，10，3： | 1 |
| 15 | Soil-carbon preservation through habitat constraints and biological limitations on decomposer activity显示文摘 | Ekschmitt K Kandeler E Poll C | | 0，，： | 1 |
| 16 | Changes innematode communities after manuring in millet fields inSenegal显示文摘 | Villenave C Bongers T Ekschmitt K | 2003 | Nematology2003，5，3： | 1 |
| 17 | Impact of agricultural subsidies on biodiversity at the landscape level显示文摘 | Gottschalk T K Diekotter T Ekschmitt K | 2007 | Landscape Ecology2007，22，5： | 1 |
| 18 | Soil biodiversity and its implications for ecosystem functioning in a heterogeneous and variable environment显示文摘 | Ekschmitt K Griffiths B S | 1998 | Applied Soil Ecology1998，10，： | 1 |
| 19 | Stabilizationof organic matter in temperate soils:Mechanisms andtheir relevance under different soil conditions - A review显示文摘 | Lützow M V K-gel-Knabner I Ekschmitt K | 2006 | European Journal of Soil Science2006，57，42： | 1 |
| 20 | Soil animals and its function显示文摘 | Ekschmitt K Griffiths B S | 1998 | Euro- pean Journal of Soil Biology1998，10，3： | 1 |
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